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  Comments for 2.4.1.0.0.A.1   
4100
Which conditions result in the formation of frost?
*A) Temperature of the collecting surface is below the dewpoint of surrounding air and the dewpoint is colder than freezing.
B) When dew forms and the temperature is below freezing.
C) The temperature of the collecting surface is at or below freezing and small droplets of moisture are falling.